genode/repos/base/include/spec/arm/cpu/cpu_state.h
2017-02-28 12:59:29 +01:00

89 lines
1.9 KiB
C++

/*
* \brief CPU state
* \author Norman Feske
* \author Stefan Kalkowski
* \author Martin Stein
* \date 2011-05-06
*/
/*
* Copyright (C) 2011-2017 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU Affero General Public License version 3.
*/
#ifndef _INCLUDE__SPEC__ARM__CPU__CPU_STATE_H_
#define _INCLUDE__SPEC__ARM__CPU__CPU_STATE_H_
/* Genode includes */
#include <base/stdint.h>
namespace Genode {
struct Cpu_state;
struct Cpu_state_modes;
}
/**
* Basic CPU state
*/
struct Genode::Cpu_state
{
/**
* Native exception types
*/
enum Cpu_exception {
RESET = 1,
UNDEFINED_INSTRUCTION = 2,
SUPERVISOR_CALL = 3,
PREFETCH_ABORT = 4,
DATA_ABORT = 5,
INTERRUPT_REQUEST = 6,
FAST_INTERRUPT_REQUEST = 7,
};
/**
* Registers
*/
addr_t r0, r1, r2, r3, r4, r5, r6,
r7, r8, r9, r10, r11, r12; /* general purpose register 0..12 */
addr_t sp; /* stack pointer */
addr_t lr; /* link register */
addr_t ip; /* instruction pointer */
addr_t cpsr; /* current program status register */
addr_t cpu_exception; /* last hardware exception */
};
/**
* Extend CPU state by banked registers
*/
struct Genode::Cpu_state_modes : Cpu_state
{
/**
* Common banked registers for exception modes
*/
struct Mode_state {
enum Mode {
UND, /* Undefined */
SVC, /* Supervisor */
ABORT, /* Abort */
IRQ, /* Interrupt */
FIQ, /* Fast Interrupt */
MAX
};
addr_t spsr; /* saved program status register */
addr_t sp; /* banked stack pointer */
addr_t lr; /* banked link register */
};
Mode_state mode[Mode_state::MAX]; /* exception mode registers */
addr_t fiq_r[5]; /* fast-interrupt mode r8-r12 */
};
#endif /* _INCLUDE__SPEC__ARM__CPU__CPU_STATE_H_ */